Method and apparatus for transceiving data via a contention-based physical uplink data channel

A method for transmitting data by a user equipment through a contention based physical uplink data channel, the method comprising:

• transmitting data through the contention based physical uplink data channel and scheduling request information through a scheduling request channel to a base station simultaneously or sequentially;
• and
• receiving ACK signal or NACK signal from the base station through a physical hybrid-ARQ indicator channel (PHICH) or uplink grant message, the ACK signal or the NACK signal indicating whether the data have been successfully decoded,
• wherein the scheduling request channel is the channel specifically allocated to the user equipment differently from another user equipment.

A base station apparatus for receiving data through a contention based physical uplink data channel, the base station apparatus comprising:

• a receiver simultaneously or sequentially receiving data through the contention based physical uplink data channel and scheduling request information through a scheduling request channel from one or more user equipment;
• and
• a processor for decoding the data received from the one or more user equipment transmit the scheduling request information, wherein the data is received through the contention based physical uplink data channel,
• wherein the scheduling request channel is the channel separately allocated to each of the one or more user equipment.

A user equipment apparatus for transmitting data through a contention based physical uplink data channel, the user equipment comprising:

• a transmitter for transmitting data through the contention based physical uplink data channel and scheduling request information through a scheduling request channel to a base station simultaneously or sequentially;
• a receiver for receiving a physical hybrid-ARQ indicator channel (PHICH) or uplink (UL) grant message from the base station;
• and
• a processor for determining whether ACK signal or NACK signal has been indicated by decoding the PHICH or the uplink grant message,
• wherein the scheduling request channel is the channel specifically allocated to the user equipment differently from another user equipment.